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MCU? #128

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songjunbiao opened this issue Feb 26, 2024 · 1 comment

songjunbiao commented Feb 26, 2024

MCU does not show the model number inside how do you analyze which model of MCU it is?

Owner

amnemonic commented Feb 26, 2024

I don't remember exactly in which way this info was obtained particularly for this radio but in general i think these are good methods:

pin count, cpu clock etc can be compared against known MCUs datasheets
searching for strings in firmware
hint is always AP-IDR value which in case of our CPU is 0x04770021 (if you know DAP/SWD/JTAG pinout)
looking what MCU vendor was used in previous products of given company
if you have firmware then you can look at startup code and search for some magic values of registers on GitHub for example

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